There is no doubt international cooperation is the key to with cyber crime.A. whether; d

问题补充：

There is no doubt international cooperation is the key to with cyber crime.

A. whether; doing

B. that; dealing

C. whether; do

D. that; deal

答案：

A. whether; doing

(答案→)B. that; dealing

C. whether; do

D. that; deal

解析：考查同位语从句和动名词做宾语：句意：毫无疑问国际合作对付网络犯罪的关键。第一空填that引导定语从句，说明doubt的内容，第二空填dealing，the key to doing，…的关键，选B。